Concrete building.



C. A. P. TURNER'.

UNURIE BUILDINGA MPMGAMON i'lLnD JANJI. mu,

Patented Apr, 30, 1912.

f" C g C 2 swims-SHEET 1,

/, f A Hanny C. A. P. TURNER.

CONCRETE BUILDING.

API'LIGATION FILED JAN.21.1910.

1,025,036. Patented Apr. 30, 1912.

2 SHEETS-SHEET 2.

WITNISSES INVENTOR UNITED sTATEs PATENT OFFICE.

CLAUDE A. P. TURNER, 0F MINNEAPOLIS, MINNFSOTA.

CONCRETE BUILDING.

b all whom, it may concern Be it known that I, CLAUDE A. P. TURNER, of Minneapolis, in the county of Hennepin and in the State of Minnesota, have invented a certain new and useful Improvement in Concrete Buildings; and I do hereby declare that the following is a full` clear, and exact description thereof.

My invention relates to buildings of reinforced concrete, and more particularly to the reinforcement of the floor slabs, and my object is to so reinforce the slab as to diminish or lessen 'the quantity of material required, while securing a certain desired ex tei-nal form, and to this end m invention consistsin the arrangement ofy reinforce ment substantially as hereinafter specified and claimed.

Referring to the accompanying drawings, Figure l is a toplan view of a column supported slab having reinforcements embodying my invention; Fig. 2 a vertical section thereof with portions or fragments of the columns shown. Fig. 3 is a top plan view showing the reinforcement for an embodiment of my invention in which no columns are used.

In the embodiment of my invention illustrated in the drawings, there are columns C of reinforced concrete or other construction, and a floor slab S of reinforced concrete. 0n the under side of the slab are ribs R that extend from column to column, and which may be structural steelbeams, or beams of reinforced concrete, and if the latter, as shown they are preferably formed integral with tbe floor slab S. Extending from one rib to an ad'acent one, contiguous to a column` are reinforcing rods or bars f that constitute a sort of head or framework, substantially concentric with the ycolumn from which said ribs radiate, and across said reinforcementsl from one column to another, extend belts ot` parallel rods or bars o', that extend in diagonal directions inter- Secting at the ticnter of the slab or panel be tween a group of four columns, and which reduce tbe bending moment in the central portion of the slab, the action of said belts of rods d, supported they are by the ribs lt, being that of the cantaliver. The ribs It besides acting ordinarily to support the load. are also utilized to support it by belts of rods or barsI y that extend across the ribs, preferably, at a distance midway' between Specification of Letters Patent. Application tiled January 21, 1910. Serial No.

Patentedapr. 3o, 1912. 539,352.

adjacent columns, said belts of rods` distributing the load to the ribs. Besides the diagonally extending belts of rods or bars d, there are similar belts of rods e, that lie parallel with the ribs R.

In view for the support of the reinforcements of the slab, it will be evident that my invenP` tion is applicable to a panel supported by beamsinstead of a floor supported by columns, and the scope determined in the light of this statement; Such a construction 1s shown in AF ig. 3, in which a single rectangular panel is shown bounded by the four su ports R1. At each of the four corners o the rectangle, the open frames forI the belts of diagonal rods d that shorten the diagonal span, are composed of parallel, Aobliquely 'arranged rods f that extend between the ribs, and by beam action transmit the slab diagonal belts d to the supports upon'iwhieh said frame-forming rods f1 rest. Instead of arranging the rods f in the form of squares, said rods may be given a circular form, the essential mattei' in this connection being the extension of the rods f across from one rib to an adjacent one or across the corners of the panels as thereby the spaniin a diagonal direction is shortened, and it is also to be understood that other forms of reinforcements than rods or'bars may be employed, without departure from the scope of my invention. A

I make no broad claim herein to the system of reinforcement bywhich aJcantaliver action for the support of the slab is secured, inasmuch as this and other characteristics of my slab reinforcement are the subject of a pending application, Serial No. 378,444, filed June l, 1906, in which l'ast named application the broad claires are made.

The fundamental characteristic of my invention can well be pointed out in comparison with the prior art, as found in the patent to Matria No. 634,986 dated Oct. 17, 1899. By the provision of rods cutting across the corners of the panel, I secure the transmission by beam action of the load from the slab to the slab supports, or beams at` the Sides of the panel, the resplt being that I increase. the bem ing moment of the beams, for the loatl is thus transmittedtof ward the longitudinal center of the side supports or beams. Matrai is essentially a susof'the utilization of the ribs Rl of my claims is to bev load from the n pended span arrangement, and its elfteet is to reduce the bending moment of the beams at the sides ot' the panel, and the loail` is transmitted into the corners of the panel that Claim is-- l. 'l`he eonibination of a slab of Concrete, slab supports arranged to forni a rectangular panel of the Slab, groups ot' rods in the slab torining a concentration ott' rodsy at and cutting across the corners of the panel and oxerlapping the supports, .series ot' rods extending diagonally of the panel and supported bv said corner rods, and series of rods extending normal to the supports.

:2. The combination of a slab of concrete, slab Asupports` arranged to t'orni a rectangular panel ot the slab, groups of rods in the saine horizontal plane in the slab forn1 ing a cinieentration of rods at and cutting across the corners of the panel Iand overlapping the supports, seriesof rods extend ing diagonally of the panel and supported by said corner rods, and series f rods extending normal to the supports.

t. 'lhe combination ot a slab of concrete, slab supports arranged to forni a ret-tan` gular panel of the slab, groups of roda in the lower part ot the slab forming a Concentration ot rods at and Cutting across the corners of the panel and overlapliing the ysupports, series o rods extending diagonally of the panel and supported by .said eorner rods, and series o't' rods extending normal to the supports.

t. The combination ot' a Islab ot concrete, ribs ea-1t integral with the slab arranged to forni rectangular panels 0l" the slabV` groups ol rods in the yslab toi-ming a Concentration ot roda at and cutting aeross the` corners of the panel and overlappingthe ribs, a series` ol' rods extending diagonall.;y ot the panel and supported by .said corner rods, and rods extending normal to the ribs.

5. 'the combination ot' a eonerete slab. rapports therel'or arranged in the forni ot' a reetangle, groupsl of rods in the lslab t'orni` ing a eoueentration of rods` at and Cutting :nii-oss the eornera of the rectangle to the contiguous side supports and overlapping the supports. whereby the diagonal span is shortened, and series otl rods extending diagonally through the slab by said corner rods.

6. The combination of a concrete slab, supports therefor arranged in the form of a rectangle, groups of rods in the slab forming a concentration of rods at and cutting across the Corners of the reetangle to the contiguous `side .supports and overlapping the supports, whereb)7 the diagonal .span is shortened, series of rods extending diago nally tl'irough the span and .supported by said corner rods, and .series ol rods extendingr through the slab diret't'l)Y from aide to side thereof.

7. The `combination otl a .slab of eonerete, columns, ribsl running from eolunm to eolumn in two directions. and forming rertangular panels, and beltsy ot rods running across the corners of the )anel and overlapping the ribs, through tlle slab from side to side ot' the panel, and diagonalljv ot the panel, there being in the angles a thirhness ot' two belts of the rods that are normal to the ribs, a thickness ot' t wo other belts of rods at the corners which malte au angle with the ribs, a thieltness of at least two belts ot rods in the eenter of the panel and a thickness of one belt of rods` at the center of the ribs'.

8. The rombination of a slab of eonerete, rolulnna, ribs running from eolunin to eolunin in t\\o diret-tions, and t'oruiin;r ree tangular panels, and belts ot rods running avi-osa the corners ot the panels.` through the .slab l'roni side to side ot' the panelind lliagonally ol" the panel and overlapping the ribs, there being in the corners a thielineas ol' two belts of the rods that are normal to the ribs, a thickness ol two other beltsy of rods at the eorners whit-h niahe au angle with the ribs` a` thirhnevs ol' tour belts ot and supported 1 rods in the center ol' the panel. a lhitltnesa of one belt of rods at the renter ot the ribs, and carrying rods in the slab erossing areas having a. thirlmess ol' one bell ot rods'.

ln testimoniY that l t-laiin the I'oregfoiug l ha re hereunto set' my hand.

L. Kme. 

